Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 6 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 06/14/2025   08:27:06   (  -0.01,-104.40) (   0.13,-105.16)   85.72                80
 06/15/2025   08:05:42   (  -0.01,-104.40) (  -0.85,-100.63)  430.00                80
 06/16/2025   20:27:39   (   0.01,-104.41) (  -0.35,-105.93)  174.49                80
 06/17/2025   20:11:36   (   0.01,-104.41) (   0.69,-101.41)  341.91                80
 06/19/2025   08:33:24   (  -0.00,-104.41) (   0.48,-106.68)  258.85                80
 06/20/2025   08:12:00   (  -0.01,-104.40) (  -0.51,-102.15)  256.92                80
 06/21/2025   20:33:57   (   0.00,-104.40) (  -0.70,-107.46)  348.69                80
 06/22/2025   20:17:53   (   0.00,-104.40) (   0.35,-102.93)  167.46                80
 06/24/2025   08:39:41   (   0.00,-104.40) (   0.87,-108.19)  432.89                80
 06/25/2025   08:18:17   (   0.01,-104.39) (  -0.18,-103.67)   82.66                80